Infiltration Characteristics Under Different Land Uses in the Loess Hilly Area

ZHAO Peng-yu; XU Xue-xuan; LIU Pu-ling; CHEN Tian-lin; LIAO Xin; LI Bo

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Infiltration Characteristics Under Different Land Uses in the Loess Hilly Area

- Infiltration Characteristics Under Different Land Uses in the Loess Hilly Area
- Bulletin of Soiland Water Conservation Vol. 28, Issue 1, Pages: 40-44(2009)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院, 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  3. 甘肃省水土保持科学研究所,甘肃,兰州,730020
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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ZHAO Peng-yu, XU Xue-xuan, LIU Pu-ling, et al. Infiltration Characteristics Under Different Land Uses in the Loess Hilly Area[J]. Bulletin of Soiland Water Conservation, 2009, 28(1): 40-44.
DOI：

ZHAO Peng-yu, XU Xue-xuan, LIU Pu-ling, et al. Infiltration Characteristics Under Different Land Uses in the Loess Hilly Area[J]. Bulletin of Soiland Water Conservation, 2009, 28(1): 40-44. DOI：

摘要

在延安燕沟试验区建立不同下垫面(草地、刈割草地、翻耕草地、灌木地、刈割灌木地、翻耕灌木地)小区

分析了30场人工模拟降雨试验的入渗资料

结果表明

植被覆盖地平均入渗率是刈割地的1.2倍

是翻耕地的2.0倍;在地表坡度7°

草灌地土壤容重分别为1.27和0.99 g/cm

条件下

坡面平均入渗率与降雨强度具有极显著的抛物线函数关系。草地、刈割草地、灌木地、刈割灌木地雨强分别达到1.62

2.21

2.49和1.71mm/mim时

平均入渗率具有最大值

分别为1.17

0.97

1.67和1.51mm/min;但翻耕草地、翻耕灌木地与此相反

雨强分别达到1.36和1.68mm/min时

平均入渗率具有最小值

分别为0.379和0.382mm/min;Horton入渗公式能较好地模拟不同土地利用方式下降雨的入渗过程。

Abstract

Six plots(grass slope

grass-cut slope

plowed grass slope

shrubby slope

shrub-cut slope

and plowed shrubby slope) in the Yan'gou watershed were constructed and infiltration data for thirty simulated rainfall events were analyzed.Results showed that the average infiltration rate on vegetable slope was 1.2 times greater than that on shrub-cut slope and 2.0 times greater than that on plowed slope.For the soil bulk density of 1.27 or 0.99 g/cm3 on grass slope or shrubby slope

the average infiltration rate varied with rainfall intensity as a parabolic function at a slope of 7 degree.When rainfall intensities for grass slope

grass-cut slope

shrubby slope

and shrub-cut slope were 1.62

2.21

2.49

and 1.71mm/mim

the maximum averaged infiltration rates were 1.17

0.97

1.67

and 1.51mm/min

respectively.In contrast

when rainfall intensities for plowed grass slope and plowed shrubby slope were 1.36 and 1.68mm/min

the minimum averaged infiltration rates were 0.379 and 0.382mm/min

respectively.In conclusion

the Horton's model better simulates the infiltration process under the condition of the different land uses.

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